docker: configure config.toml using environment variable

[navilg]

Instead of updating config.toml file to configure Perplexica, We can use environment variables to configure those configs.

For example to configure below section

[MODELS.CUSTOM_OPENAI]
API_KEY = "sk-123456"
API_URL = "http://localopenai:11134"
MODEL_NAME = "meta-llama/llama-4"

we can set envrionment variable MODELS_CUSTOM_OPENAI_API_KEY="sk-123456", MODELS_CUSTOM_OPENAI_API_URL="http://localopenai:11134" and MODELS_CUSTOM_OPENAI_MODEL_NAME="meta-llama/llama-4" by simply setting variable SECTION_WITH_DOTS_REPLACED_WITH_UNDERSCORE_KEYNAME=VALUE

This will fix issue #673 and #750.

[djmaze]

This should be MODELS_OLLAMA_API_URL

[djmaze]

Should be MODELS_LM_STUDIO_API_URL

[navilg]

Thanks for reviewing PR @djmaze . I have corrected the code as per your comment and fixed the merged conflict.

[carbolymer]

Any chance to push this forward?

[cubic-dev-ai]

cubic found 2 issues across 4 files. Review them in cubic.dev

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